Add buffer flags on buffer command and completion

src/background/usecases/completions.js

@@ -5,12 +5,14 @@ import CommandDocs from '../domains/command-docs';
 import CompletionRepository from '../repositories/completions';
 import * as filters from './filters';
 import SettingRepository from '../repositories/setting';
+import TabPresenter from '../presenters/tab';
 import * as properties from '../../shared/settings/properties';
 
 const COMPLETION_ITEM_LIMIT = 10;
 
 export default class CompletionsInteractor {
   constructor() {
+    this.tabPresenter = new TabPresenter();
     this.completionRepository = new CompletionRepository();
     this.settingRepository = new SettingRepository();
   }
@@ -50,8 +52,48 @@ export default class CompletionsInteractor {
     return new Completions(groups);
   }
 
-  queryBuffer(name, keywords) {
-    return this.queryTabs(name, false, keywords);
+  // eslint-disable-next-line max-statements
+  async queryBuffer(name, keywords) {
+    let lastId = await this.tabPresenter.getLastSelectedId();
+    let trimmed = keywords.trim();
+    let tabs = [];
+    if (trimmed.length > 0 && !isNaN(trimmed)) {
+      let all = await this.tabPresenter.getAll();
+      let index = parseInt(trimmed, 10) - 1;
+      if (index >= 0 && index < all.length) {
+        tabs = [all[index]];
+      }
+    } else if (trimmed === '%') {
+      let all = await this.tabPresenter.getAll();
+      let tab = all.find(t => t.active);
+      tabs = [tab];
+    } else if (trimmed === '#') {
+      if (typeof lastId !== 'undefined' && lastId !== null) {
+        let all = await this.tabPresenter.getAll();
+        let tab = all.find(t => t.id === lastId);
+        tabs = [tab];
+      }
+    } else {
+      tabs = await this.completionRepository.queryTabs(keywords, false);
+    }
+    const flag = (tab) => {
+      if (tab.active) {
+        return '%';
+      } else if (tab.id === lastId) {
+        return '#';
+      }
+      return ' ';
+    };
+    let items = tabs.map(tab => new CompletionItem({
+      caption: tab.index + 1 + ': ' + flag(tab) + ' ' + tab.title,
+      content: name + ' ' + tab.title,
+      url: tab.url,
+      icon: tab.favIconUrl
+    }));
+    if (items.length === 0) {
+      return Promise.resolve(Completions.empty());
+    }
+    return new Completions([new CompletionGroup('Buffers', items)]);
   }
 
   queryBdelete(name, keywords) {